| 1 | Fruit calyx lobes valvate, not incrassate at base. Chromosome number x = 11. Tribe Dipterocarpeae. |
| 1' | Fruit calyx lobes ± imbricate and with a distinctly incrassate central swelling at base. Chromosome number x = 7. Tribe Shoreae. |
| 2 | Base of calyx united into a tube enclosing at least the basal half of the nut. |
| 2' | Base of calyx not as above. |
| 3 | Connectival appendages stout, tapering, at most x length of anthers to long-filiform. Nut free. Innovations not lepidote. Leaf without prominent intramarginal nerve; vernation plicate. Fig. 17Fig. 18Fig. 19Fig. 20 |
| 3' | Connectival appendages slender, at least 2 x length of anthers. Nut adnate to calyx tube. Innovations and leaf beneath densely peltate lepidote. Leaf with prominent looped intramarginal nerve; vernation not plicate. Fig. 27, Fig. 30. |
| 4 | Branching of inflorescence truly cymose. Stamens at least 25. Fruit triangular in section. Fig. 33Fig. 34 |
| 4' | Branching of inflorescence racemose or subcymose. Stamens not exceeding 15. Fruit terete on section. |
| 5 | Anthers linear, setose along the lateral margins. Style at least 2 x length of ovary. Leaf with distinct looped intramarginal nerve. Fig. 37, Fig. 40 |
| 5' | Anthers broadly oblong to subglobose, glabrous. Style less than 2 x length of ovary. Leaf without looped intramarginal nerve. Fig. 41Fig. 42 |
| 6 | Fruit calyx lobes all aliform, subequal, or all short; fusing into a shallow cup at base. Nervation densely parallel. Fig. 48, Fig. 50 |
| 6' | Fruit calyx sepals not as above, unequal if aliform or short and subequal. Nervation not as above. |
| 7 | Fruit sepals aliform, unequal, narrowly imbricate. Nut globose, verrucose, lenticellate. Vernation plicate. Fig. 54Fig. 57 |
| 7' | Fruit sepals prominently imbricate. Nut ovoid, smooth. Vernation not plicate. |
| 8 | Stamens 15; anthers linear-lorate, with very short terminal connectional appendages. Fruit sepals short, subequal. Fig. 60Fig. 61 |
| 8' | Not as above. |
| 9 | Fruit calyx with 2 aliform and 3 short sepals; if they are all short and subequal then identifiable only by sectional characters of the flower. Fig. 62Fig. 63Fig. 64Fig. 65Fig. 66Fig. 67Fig. 68Fig. 69Fig. 70Fig. 71Fig. 72Fig. 73Fig. 74Fig. 75Fig. 76 |
| 9' | Fruit calyx with 3 aliform and 2 short sepals, rarely 5 aliform, unequal; if they are all short and subequal then identifiable only by sectional characters of the flower. Fig. 77Fig. 78Fig. 79Fig. 80Fig. 81Fig. 82Fig. 83Fig. 84Fig. 85Fig. 86Fig. 87Fig. 88Fig. 89Fig. 90Fig. 91Fig. 92Fig. 93Fig. 94Fig. 95Fig. 96Fig. 97Fig. 98Fig. 99Fig. 100Fig. 101Fig. 102Fig. 103Fig. 104Fig. 105Fig. 106Fig. 107Fig. 108Fig. 109Fig. 110Fig. 111Fig. 112Fig. 113Fig. 114Fig. 115Fig. 116 |
